I see your point. Have all the technological, economic, and social advances of the last hundred years, which have certainly imporved the quality of life for many people everywhere, made the world more interesting and vibrant overall, or instead has it in fact made it more homgenized and mundane, and therefore more photographically sterile? On the surface, progress promises to give us more variety and more to choose from, and yet ironically, it can also bring about a kind of mass produced, cookie-cutter banality as well. It's what American sociologist George Ritzer calls the MacDonaldization of our society -- Google the word for some intersting reading.
I'm not much into nostalgia or anything that's intentionally "retro" in my photography, but I do like to find subjects that I consider "funky": basic, essential and lacking artifice in an appealing way, but with a genuine flavor. It does seem to me that it's getting harder to find funky stuff out there, either to photograph or otherwise. Things get gentrified -- houses, neighborhoods, businesses, and restaurants that were once funky get redeveloped so that they can then be pimped for whatever is left of their funkiness.
Thanks for starting an interesting thread.